infix episode 2-5 type 7-7 astid 9-16 avgturn 18-27 cntl 29-33 turnl 35-43 retl 45-53 cnth 55-59 turnh 61-69 reth 71-79 using "e:\FIS\rets_high_low_vol_rep.txt"
summarize reth retl avgturn turnh turnl cnth cntl
summarize reth retl avgturn turnh turnl cnth cntl if type == 1
summarize reth retl avgturn turnh turnl cnth cntl if type == 2
summarize reth retl avgturn turnh turnl cnth cntl if type == 3
gen difret = reth-retl
ttest difret == 0
ttest difret == 0 if type == 1
ttest difret == 0 if type == 2
ttest difret == 0 if type == 3